Wrench



Cil

Patented Nov. Z0, i923.

runes anonrBaLnfn-oen DUNCAN, or NAPANEE, ONTARIO, CANADA.

WRENCH.

Apnlcatonnled February 13, `1922. Serial No. 536,104.

To all 'whom t may con-cern.'

Be it known that l, ARCHIBALD HUGr-r DUNCAN, a subject of the King ofEngland, residing at Napanee, in the county of Lennox and ddington andProvince of lQn-. tario, Dominion of Canada, have inventedY certain newand useful improvements in 1Wrenches'of which the following is a speci-Ytion and arrangement whereby the adjust-vk ment of the jaws and theapplication ofthe wrench to a' nut may be `quickly accomplished by theoperator grasping the wrench and operating the saine with one hand.

A further object is to secure maximum rigidity of the jaws and toprovide an arrangement of the pawls whereby the movable jaw will belooked against movement and will withstand any strain, for which thebody of the wrench isv designed, without slippage or liability ofbreakage. f Y

A further object is to'provide a wrench of the character described whichwill present a very neat appearance and a smooth exterior having noprojecting portions liable to interfere with the application of thewrench to the work or to the operation of the wrench. y

It is also an object ofthe invention to provide a very strong compactconstruction which is cheap to manufacture and has certain other new anduseful features herein after more fully set forth. f

Vith the above and other ends in view, the invention consists in thematters hereinafter set forth and more particular y pointed out in theappended claim, reference being` had to the accompanying' drawing inwhich- Figure l is a side elevation of a wrench illustrative of theinvention; l

Fig. 2 is an edge elevation of the same; and Y Fig. 3 is an enlargedcross sectional detail of a portion of the wrench.

As shown in the drawing, l indicates a body or stemof the wrench whichis preferably a substantially steel bar of greater width than thicknessand rectangular in cross section, one end of this bar or body formingthe handle portion 2 of the wrench body, and as they and the oppositeend of the bar being offset laterally to form thelfixed jaw 3 kof thewrench.` Sleeved upon Vthis bar or'body lis a sleeve 4t which in crosssection is of substantially rectangular formV and fits closely` the barl sliding freely thereon.V This sleeve is formed with a laterally offsetportion forming the movable jaw 5 of the wrench. rEhe sleeve is alsoformed with ylongitudinally extending portions forming ears 6 and 7 atthe back and front edges ofthe `body,*"' and pivotedbetween these ears 7are suit#` able pawls S and 9 lying adjacent the side: Y

faces of the body l and preferably of awidth` equal to that. of thebody. Pins lO passing' through openings in the ears 7 and openings inthe pawls, pivotally attach these pawls intermediate their ends to theears and each pawl is curved on its outer side longitudinally of thebody and, asshown, Vmay be hnurled to provide an efficient finger holdso that'these pawls may be readily turned upon their pivots Vagainst theaction of the springs il comprising spring/wires 4which are securelyfixed at one end within holes bored longitudinally inward` from Vone endofthe sleeve'with their free ends incontact with the inner sides of thetail por-A clearly illustrated in Fig. 3, only one lof theV pawls willbe seated in a notch and the other pawl will be half way up the inclineof the tooth at the other side of the body, thus providing a very fineadjustment of the mov-V able jaw without the necessity for making theratchet teeth so fine that there would be vliability ofV slippage whenheavy strain is applied to the wrench.

As the pawls engage the sides of the are of lsubstantially the fullwidth 'of the body, a very secure hold on the body is provided 'and thestrain is taken by the Vpawl in a transverese direction, thus insuringagainst slippage and at the saine time relieving the pivots of thesepawls from much of the strain which would otherwise come directlythereon.

Further, the arrangement of the pavvls at the sides of the body permitthe operator in grasping the wrench to apply the Vsame to a. nut, to atthe same time grasp the paWls in a convenient manner for compressing ordeflecting the springs 11 and thus releasing the dogs from engagementWith the ratchet teeth. The operator nia-y therefore, with one hand,conveniently operate `this Wrench, sliding vthe vmovable jaw up intofirm contact vvith thenutvas he applies the wrench to the nut. `As thedogs are ofsubstantially the same Width as the body of the Wrench, amplesurface is provided so that the operators lingers xvillreadily engageand operate the dogs, and as these outer surfaces of the dogs are curvedvin the direction of the length oflthe tbody, a smooth rounded exterioris presented and as thesprings l1 are located entirely beneaththedogsthere are noeXternal projections upon the Wrenchto interfere withness to provide Wide side faces and narrovsT front and back edges, saidbody being formed with anintegral jaw portion projecting laterallyfromthe front edge of said body,.and a movable jaw opposing the fixedjaw and having a sleeve portion sleeved upon said body to slidelongitudinally thereon, said Wrench being characterized in that saidWide side faces are lformed with teeth extending transversely of saidfaces and parallel with the longitudinal plane of said jaws, and pavvlspivotally connected to said sleeve of said Vmovable javf` to swing to-Ward said Wide side faces of the body into engagement with said teeth,said paxvls having Wide end portions to engage said teeth and to have vabearing thereonthroughout the Width of said side faces of said body, andsaid` teeth and pawls being relatively positioned in such manner thatactive pawl engagement rduring service is limited to a single pawl. l

In testimony whereof I` afIiX my signature in presence of twoWitnesses.,

ARCHIBALD HUGH DUNCAN.

Witnesses:

W. A. GRANGEh MARGARET NOLAN.

